I have some situations where the horizontal support angle gamma can be greater then 120 degrees if we do a vertical projection of the horizontal support angle 120 degrees for example for hot pipelines (PE-PUR-steel). The angle is greater then 120 degrees on the steel pipe due to the projection. The moment coefficients and deflection coefficients can be calculated according to the 'Geo-Tubomechanica':

In most cases it is relatively easy to re-calculate values if the actual horizontal support angle is not 120 degrees.
We discussed this issue in the past and then decided to give it a low priority. However, there are discussions going on to increase its priority. Your wish and remarks are fuelling those discussions...
So, this wish is part of our to-do list, for this forum I assigned ticket no J-1733 to it.